JSON

#webdev #javascript #api #beginners

What is JSON ?

JavaScript Object Notation.
Lightweight data-interchange format.
Based on a subset of JavaScript.
Easy to read and write.
Often used with AJAX(Asynchronous JavaScript XML).
Can be used with most modern languages.

Data Types

Number : No difference between integer and floats.
String : string of Unicode characters. Use double quotes.
Boolean : True or False.
Array : Ordered list of 0 or more values.
Object : Unordered collection of key/value pairs.
Null : Empty values.

💡 Tip One way to remember JSON-valid data types: BASONN:

Booleans

Arrays

Strings

Objects

Numbers

Null

JSON Syntax Rules

Use key/value pairs - {"name":"John"}
Uses double quotes around KEY and VALUES.
Must use the specific data types.
File type is ".json".
MIME type is "Application/json".

JSON Example

{
    "name": "John",
    "age": 35,
    "address":{
        "street":"5 main street",
        "city": "Boston"
    },
    "children": ["Michel","Nick"]
}